920221038491 has 8 divisors (see below), whose sum is σ = 983998736064. Its totient is φ = 857515235200.

The previous prime is 920221038467. The next prime is 920221038547. The reversal of 920221038491 is 194830122029.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 920221038491 - 2²² = 920216844187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920221038421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267971795 + ... + 267975228.

It is an arithmetic number, because the mean of its divisors is an integer number (122999842008).

Almost surely, 2^920221038491 is an apocalyptic number.

920221038491 is a deficient number, since it is larger than the sum of its proper divisors (63777697573).

920221038491 is a wasteful number, since it uses less digits than its factorization.

920221038491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535947141.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 920221038491 in words is "nine hundred twenty billion, two hundred twenty-one million, thirty-eight thousand, four hundred ninety-one".